词典释义：
(of a person)unable to speak, most typically because of congenital deafness
（人）（尤指先天性）哑的
-
he was born deaf, dumb, and blind. 他生来就是又聋又哑又盲的。
(of animals)unable to speak as a natural state and thus regarded as helpless or deserving pity
（动物）无说话能力的（天生如此，因而是无助或值得同情的）。
[predic.]temporarily unable or unwilling to speak
（暂时）说不出话的；不愿说话的；沉默（寡言）的
-
she stood dumb while he poured out a stream of abuse. 他骂不绝口时她只是默不作声地站着。
[attrib.]resulting in or expressed by speechlessness
导致语塞的；无声的；无言的；不用语言表达的
-
they stared in dumb amazement.
他们惊得目瞪口呆。
〈非 正式，主北美〉 笨的，愚蠢的
-
a dumb question. 一个愚蠢的问题。
(of a computer terminal)able only to transmit data to or receive data from a computer; having no independent processing capability.
（计算机终端）简易的，哑的（指没有独立处理信息的能力）。常与<Bold>INTELLIGENT</Bold>相对。
(
〈北美，非正式〉使通俗化（指简化或降低某事物的知识性以便让更多人接受）
-
the producers categorically deny that they're dumbing down the show. 制作者明确否认他们正在使节目通俗化。
[no obj.](
变得通俗化
-
the need to dumb down for mass audiences. 为适应广大观众而使节目变得通俗化的需要。
〈诗／文〉 使变哑，使不被听见；使沉默
-
a splendour that dazed the mind and dumbed the tongue. 让人心醉神迷、叹为观止的壮丽景象。
"Old English, of Germanic origin; related to Old Norse
